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b=FVPTfr/R0QD61EFQyyj4rj+imGDBnQ9tACcPP6NB1RPh6nSF50yc7my9PXGY/alSY WgFLfr4fEY8mhypvAus1SojlL+kqTFtAnfZs43OXc5pXtGrUaBehnEI5AzSHohVu63 bTaEuwQaGYxTt7U2JwxKAru1mrkmoRPjZx0naRH/MsZXC7iwhv9NhMPAu+k1BzYmJj JZQgWoOIQypyDgOfzHg9MJrTfxRreSASZvt0FTg4HH4L3pzM4uiJlaLnKRPGO5P9ac 65bpvHzOba9uUQMyPod5l1GbXHr9nEf/PdvMR/jX68tWQRG+rvnQvlUlluIBexOrAg NQ7297TiyJv9w== Message-ID: Date: Mon, 1 Jun 2026 17:43:11 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Process (was Re: [PATCH mm-hotfixes-unstable v18 00/14] khugepaged: add mTHP) collapse support To: Lorenzo Stoakes , "Vlastimil Babka (SUSE)" Cc: Nico Pache , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, liam@infradead.org, mhocko@suse.com, rppt@kernel.org, vbabka@suse.cz, willy@infradead.org References: <20260522150009.121603-1-npache@redhat.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 73FA418000B X-Stat-Signature: yn8484n1nh9nc19fi1g1ryz56xxpewih X-HE-Tag: 1780328596-567989 X-HE-Meta: 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 1hAmCuI4 iqnL9HSUUJBZpF5QUcSE68bq3TA0fM3M9iD81Zk56bMj5MECl378fCGC0G9PvUusgcNhU7aiFFJhvXwa0xf/SWdEWUMJI7XBY4hrp8o0Eun/Qf6NAMnE4+50QV6mBUwDy3KmdYMedo+mP/gD6PP/ozVOQEBtJJlvFjBOksI/KSQvcAcrEcWPhKpcrCiRvabwcpmpmvKS1C9E1sLiSeMD8L9+zTpuyd9fvpc38v/AjsImFvs821ADb6vO5oxD/YpzbfSOH Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: >>> and have people >>> base work against that? >> >> This I'm not so sure how it would work. Assuming we have submaintainers with >> their trees and branches, the final "stable branch" is merged from those. > > I feel like it could get hairy pretty quick, but I guess the key thing here is - > maintainers resolve merge conflicts. > > As long as we have a specific _solid_ basis for work. > > I think actually this speaks to it being sensible for each submaintainer with a > separate tree to maintain their own repos rather than branches. > > We need to determine what this baseline would be for each tree though. > > So perhaps each submaintainer tree has for-mm-next that's the stable branch from > mm-next + any stabliised local changes. > > And each week this gets merged to mm-next, and everybody resets to mm-next > stable branch? I think it gets way more complicated than that once we involve hotfix branches, and dependencies between hotfixes, topic branches and all of that. And in particular, if we have to drop a topic branch in some circumstances. My first step will be to understand "how would it look like without submaintainers" when only having topic branches. Then, add a complexity level on top with subcomonent maintainers :) I'll probably schedule a session in 2 weeks. Whom to invite? -- Cheers, David